RE:Packaging python-xrayutilities

[MARIE Alexandre <alexandre.marie@synchrotron-soleil.fr>]

Hello,

I resolved my git issue, but when I build the package doc with sphinx-build :

```
make[1]: Entering directory '/<<PKGBUILDDIR>>'
pybuild --build -s custom -p 3.7 --build-args="env PYTHONPATH={build_dir} sphinx-build -bhtml doc/source build/sphinx/html"
I: pybuild base:217: env PYTHONPATH=/<<PKGBUILDDIR>>/.pybuild/cpython3_3.7_xrayutilities/build sphinx-build -bhtml doc/source build/sphinx/html
```

I get this error :

```
/<<PKGBUILDDIR>>/doc/source/examples.rst:7: WARNING: Duplicate explicit target name: "here".
WARNING: autodoc: failed to import module 'xrayutilities'; the following exception was raised:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/sphinx/ext/autodoc/importer.py", line 154, in import_module
    __import__(modname)
  File "/<<PKGBUILDDIR>>/.pybuild/cpython3_3.7_xrayutilities/build/xrayutilities/__init__.py", line 74, in <module>
    __version__ = pkg_resources.get_distribution("xrayutilities").version
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 481, in get_distribution
    dist = get_provider(dist)
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 357, in get_provider
    return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 900, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python3/dist-packages/pkg_resources/__init__.py", line 786, in resolve
    raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'xrayutilities' distribution was not found and is required by the application
```

Does someone know how to deal with this kind of issue ?

Thanks in advance. Cheers,

Alex